How to remove the screen on Xiaomi Mi 9T: detailed manual

Modern smartphones like the Xiaomi Mi 9T and its powerful Pro version are famous for their bezel-less design and retractable camera, making them visually appealing but technically difficult to repair. Replacing the display on this model is not an easy task, requiring not only accuracy, but also a specific set of tools, since the screen is glued to the body, not just inserted into a frame. Owners often face a situation when the glass breaks or the sensor stops working, and the only way out is a complete replacement of the module.

It's important to understand that the dismantling procedure involves not only unplugging the broken matrix, but also the complex process of transferring important components to a new part. The adhesive base in the factory is machine-made, so you'll have to use special solvents and precision tools at home. If you're not sure about yourself, you'd better contact the service, but for those who decide to repair themselves, this article will be a detailed guide.

Before we start, we need to be aware of the risks: mishandling the plumes can cause the motherboard to fail, and leakproofing the case will deprive the device of dust protection. However, with all the technological regulations and a quality repair kit, it is quite possible to restore the functionality of the gadget, and we will analyze each step, from the perimeter warm-up to the final assembly, to minimize the likelihood of errors.

Tools and workplace preparation required

For the successful execution of the procedure, you will need a specialized set of tools, since ordinary household items can not be done here. The key element is a heating device, whether it is a thermophene or a professional separator, which will soften the factory glue without overheating the internal components. You will also need a thin string or a special knife to cut the adhesive layer, as mechanical picking will lead to destruction. OLED-matrix.

Don't forget to prepare a set of precision screwdrivers, particularly the cross PH000 and flat, for working with screws inside the case. To work with electronics, plastic blades, mediators and tweezers with curved ends that do not conduct current and do not scratch contacts. Pay special attention to consumables: you will need a quality B-7000 or T-7000 adhesives, as well as isopropyl alcohol for degreasing surfaces.

• 🛠️ Thermophen or heating pad for softening the adhesive around the perimeter.
• 🔪 Thin string or special knife for cutting glue.
• 🧪 Isopropyl alcohol and pipette for dissolving adhesive.
• 🧲 Magnetic card for sorting screws of different sizes.

Workspace organization is as important as tools: Provide good lighting and a clean surface covered with a soft mat so that small screws don't get lost and parts don't get scratched. Prepare a container for adhesives and a holder for a board if you plan to re-adhere glass, although most of the time the entire module is changed with a frame.

Dismantling of the back cover and protective panels

The process of disassembling the Xiaomi Mi 9T begins with the removal of the rear glass panel, which is attached to the two-part glue. To do this, you need to evenly warm the perimeter of the device with a hairdryer to a temperature of about 80-90 degrees, constantly checking the heating with your finger so as not to damage the matrix on the front side or the battery. After warming up, use a suction cup to create a small gap, and carefully enter the plastic card or blade as you move along the circuit.

⚠️ Warning: Don't try to cover the camera or logo, because there are internal elements that are easily damaged.

After successfully removing the back cover, you will see the inside of the smartphone, closed by a black plastic panel that holds the main camera module and fingerprint scanner, which is also glued, but less aggressively, and requires careful detaching of the plumes before completely dismantling, first you need to unscrew the screws that fix the protective plate, and disconnect the camera plumes and fingerprint from the motherboard.

Be especially careful when working with the plume of the fingerprint scanner, as it is very thin and easily breaks when handled carelessly. Use tweezers or plastic blades to snap connectors without undue effort. After disconnecting all connections, you can carefully remove the plastic lining, opening access to the battery and bottom plumes of the display.

Disconnecting the battery and removing protective screens

The first and most important step after opening the insides is to shut down the battery, which is a critical step that prevents the power controller from short-circuiting and damaging further manipulation of the display plumes. Find the battery connector, which is usually located at the bottom of the board or under metal protection, and gently disconnect it by putting a plastic blade on the bottom.

Next, remove the metal protective plates that cover the display and touchscreen connectors, which are mounted with multiple screws of different sizes, so it is recommended to use a magnetic card or circuit to remember the location of each screw. After unscrewing all the fasteners, carefully remove the metal screens, trying not to touch the small components on the board.

Now that the plumes are open, you can proceed to disable them.The display plume in the Xiaomi Mi 9T is wide and consists of several parts, including the screen plume and the touchscreen plume, which can be combined or separated depending on the version of the module. Carefully bend the latches (if any) and pull the plume up, parallel to the plane of the connector, so as not to break the contacts.

• 🔋 Always turn off the battery before working with any display plumes.
• 🔩 Sort the screws during disassembly, they have different lengths and threads.
• 💾 The plumes are very fragile, avoid cracks and strong tension.
• 🧤 Use antistatic gloves to protect electronics.

Removing the old display and preparing the frame

At this point, you have to remove the display module, which in the case of the Xiaomi Mi 9T is often sold in the frame. If you have a module without a frame, the process is complicated by the need to repaint the glass and transfer all the elements to a new frame, which requires a separator and experience. In most cases, it is recommended to buy a module in the frame, which greatly simplifies the task and guarantees the perfect geometry of the case after assembly.

If the module is framed, then after all the plumes are turned off, you need to twist the screws that lock the frame itself to the middle of the body, which are usually few and located around the perimeter. Once the screws are removed, the module can be carefully removed from the body, helping yourself with a suction cup or a plastic card, if the glue still holds it.

In case you change only a glass or a matrix without a frame, you need to remove the old frame. To do this, heat the perimeter of the screen and use a thin string or a special knife to cut the adhesive layer between the matrix and the frame. The movements should be smooth, without jerks, so as not to crush. OLED-After removing the old matrix, the frame must be thoroughly cleaned of glue residues using alcohol and a blade, degreased and applied a new layer of adhesive.

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When buying a module without a frame, make sure that the thickness of the new matrix coincides with the original, otherwise there may be problems with landing in the case or touch screen operation.

Installation of a new module and assembly of the device

Before installing the new module, it is strongly recommended to test the connection without permanently gluing the screen: connect the display and touchscreen plumes to the motherboard, connect the battery and turn on the device. Check the image performance, the presence of broken pixels, the reaction to touch and the operation of the proximity sensor.

If the test is successful, turn off the phone and turn off the battery again. Apply a thin layer of glue B-7000 or T-7000 on the frame of the new module (or on the cleaned frame of the case). Carefully insert the module into the case, making sure that all the plumes are stacked in their channels and not clamped. Press the screen evenly around the perimeter for fixation.

Next comes the reverse assembly process: put metal plates in place and twist all the screws. Connect the battery plume and check the charging. Set the back cover by pre-applying a new layer of glue or using a finished adhesive tape. Press the lid around the perimeter and lock the device with rubber bands for 15-20 minutes before the initial grip of the glue.

⚠️ Warning: Do not turn on the phone immediately after assembly, let the glue dry at least 30-60 Early activation may cause components to shift within the housing.

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The quality of repair depends on the cleanliness of the surfaces and the correct stacking of the plumes. Any tightened plume can lead to the inoperability of the touchscreen or the appearance of artifacts on the screen.

Frequent errors and ways to fix them

One of the most common mistakes when replacing the screen with Xiaomi Mi 9T is to damage the touchscreen plume when disassembled sloppy. If the phone works after assembly but does not respond to touch, check the density of the connector and the integrity of the plume itself. Sometimes it helps to reinstall the connector or clean the contacts with alcohol.

Another problem is the appearance of yellow spots or uneven lighting at the edges of the screen, which may indicate excessive pressure on the matrix when assembly or using too much glue that has been squeezed inside, in which cases it is often necessary to redisassemble and eliminate the source of pressure.

Also, users often forget to rearrange the proximity sensor or misfold the plume, which causes the screen to go out during a conversation or not go out at all. Make sure that the rubber sensor seal is in place and not covered with glue or dust. Careful inspection of all stages of the assembly will help to avoid re-repair.

• 👁️ Check the proximity sensor before the final gluing.
• 🧹 Remove all dust from the inside of the screen before assembly.
• 🔌 Make sure all connectors are snapped to a characteristic click.
• 🧪 Use a minimum of glue so that it does not leak onto the matrix.

Questions and Answers (FAQ)